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03-28-2011, 07:28 PM   #1
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Smudge in Blue Sky

I am not sure if the attached picture indicates dust or an actual smudge. I am going to get a rocket blower just in case it is dust. If this does not correct the problem I will check to see how much one of our local shops will charge to clean the camera. I am not comfortable doing it myself.

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03-28-2011, 08:42 PM   #2
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Most likely dust. Wet cleaning, if necessary, isn't all that difficult, and the equipment is more robust than many people give it credit for being.
03-28-2011, 08:52 PM   #3
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Looks like a tiny lint in the sensor, I would try to do the mirror up and blow it off with jet blower while keeping the camera facing down. It works for me.
03-29-2011, 04:30 AM   #4
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Thanks

Okay thanks will give the blower a try and then go from that point. Though won't be able to fully test to see if it worked until the weekend as the rest of the week it is suppose to be cloudy and rainy.

Thanks again..

03-29-2011, 04:46 AM   #5
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Surely any evenly light plain light bright surface will do for test shots? For example a bit of pain white paper stuck in a window?
03-29-2011, 05:44 AM   #6
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Actually, it looks more like an issue with your lens. Have you tried a different lens?
03-29-2011, 12:19 PM   #7
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A bit of contrast enhancement shows that your spec is sharply defined - very much so indeed:



Surely, this cannot be an issue with the lens. It has to be "something solid" on the sensor.

I would guess it is a kind of fibre - in which case a blower should be able to do the job. When you check: Stop down your lens as much as you can and point it to the sky; expose for several seconds and you should be able to see the dust and specs clearly. (It does not have to be a bright blue sky - and remember to stop down your lens).

B.R. / Steen G. B.
03-29-2011, 01:15 PM   #8
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Looks like there's a second mark as well, at 3 o'clock to the moon and 5 o'clock to the first mark.

03-29-2011, 11:15 PM   #9
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Just to clarify things for the OP, if there is a visible smudge or mark showing on your pictures, then there is something on your sensor.
Dust on the lens or screen or mirror WILL NEVER show themselves on an image unless you have the lens racked out so far that you are focused on the glass itself.
03-30-2011, 04:32 AM   #10
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Thanks everyone for your input... Nothing new to report as of yet as I still need to get the blower. Once I have done so I will do some testing after I have blown the sensor with air.
04-01-2011, 07:01 PM   #11
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Used a blower

I didn't get nor use the Rocket Blower but instead used an unused ear blower that we had in our bathroom cabinet. It did the trick and cleared up the "dust smudge" marks. Rather is odd that dust on the sensor can look like a smudge mark.

I do appreciate everyone's help clearing up what exactly it could have been.
04-03-2011, 04:14 PM   #12
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QuoteOriginally posted by JTWilson37209 Quote
Rather is odd that dust on the sensor can look like a smudge mark.
not really its just well out of focus thats all

I discovered that my K10D was quite prone to dust on the sensor but my K7 seems to be more immune

cheers
Dave
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